Question

PLEASE SHOW ALL WORK!

A 50-turn coil of wire lies in a magnetic field directed into
the page. The coil has an

initial area of 0.325 cm^2

a) If the magnetic field strength is 1.50 T, what is the
magnetic flux through the coil?

b) Suppose we now crush the coil so that its area is very
small; i.e., effectively zero. If

this process takes 0.175 s, what is the average induced
emf?

Answer #1

6: A single-turn circular loop of wire rests flat on this page.
A magnetic field is directed perpendicular to this page pointing
outwards (towards you). When the magnetic field strength increases
from 3.2 T to 6.5 T in 0.026 seconds, a 1 V emf is induced in the
coil.
a) Calculate the radius of the loop.
b) State the direction of the induced current and briefly
explain how you arrived at your answer.

shows a 100-turn coil of wire of radius 15 cm in a 0.25 T
magnetic field. The coil is rotated 90? in 0.30 s, ending up
parallel to the field. What is the average emf induced in the coil
as it rotates?

A 37-turn circular coil of
radius 4.60 cm and resistance 1.00 Ω is placed
in a magnetic field directed perpendicular to the plane of the
coil. The magnitude of the magnetic field varies in time according
to the expression B = 0.010
0t + 0.040 0t2,
where B is in teslas and t is in
seconds. Calculate the induced emf in the coil
at t = 4.20 s.

A magnetic field is perpendicular to the plane of a single-turn
circular coil. The magnitude of the field is changing, so that an
emf of 0.23 V and a current of 2.4 A are induced in the coil. The
wire is then re-formed into a single-turn square coil, which is
used in the same magnetic field (again perpendicular to the plane
of the coil and with a magnitude changing at the same rate). What
(a) emf and (b) current are...

A five-turn circular wire coil of radius 0.425 m lies in a plane
perpendicular to a uniform magnetic field of magnitude 0.370 T. If
the wire is reshaped from a five-turn circle to a three-turn circle
in 0.101 s (while remaining in the same plane), what is the average
induced emf in the wire during this time?

9. A magnetic field is perpendicular to the
plane of a single-turn circular coil. The magnitude of the field is
changing, so that an emf of 0.77 V and a current of 2.7 A are
induced in the coil. The wire is then re-formed into a single-turn
square coil, which is used in the same magnetic field (again
perpendicular to the plane of the coil and with a magnitude
changing at the same rate). What emf is induced in the...

An 1000-turn coil of wire that is 2.2 cm in diameter is in a
magnetic field that drops from 0.12 T to 0 T in 11 ms . The axis of
the coil is parallel to the field.
What is the emf of the coil?
E = ______V
Please show work

A 149-turn circular coil of radius 2.67 cm is immersed in a
uniform magnetic field that is perpendicular to the plane of the
coil. During 0.153 s the magnetic field strength increases from
51.1 mT to 99.3 mT. Find the magnitude of the average EMF, in
millivolts, that is induced in the coil during this time
interval.

3. A circular coil of wire is rotating in a magnetic field such
that it cuts through the field's lines. The amplitude of the
induced EMF generated in the coil is 7.9 mV. Which of the following
could be done to INCREASE the amplitude of the EMF
induced in the coil?
a. reshape the coil into a square instead of a circle
b. rotate the coil such that its axis of rotation is parallel to
the magnetic field instead of...

A magnetic field, strength 3T, has a direction out of the page.
A loop of wire sits in the field and on the plane of the page (area
vector of loop is out of page). The loop is much smaller than the
extent of the field. The magnetic field starts to slowly change at
a rate of -0.0001T/s. Looking down on the loop, which statement is
correct?
A. Magnetic flux out of page decreasing; anti-clockwise current
induced in loop
B....

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